* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #000000;
    --accent: #FFFF00;
    --accent-subtle: #f0f0f0;
    --bg: #ffffff;
    --text: #000000;
    --text-light: #666666;
    --text-lighter: #999999;
    --border: #e5e7eb;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background: var(--bg);
    border-bottom: none;
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1.5rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0;
}

.logo {
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--text);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.logo-dot {
    color: var(--accent);
    font-weight: 900;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 3rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--text-light);
}

/* Buttons */
.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 0.75rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    letter-spacing: -0.01em;
}

.btn-primary {
    background: var(--primary);
    color: white;
    width: 100%;
    max-width: 100%;
    margin-top: 1.5rem;
}

.btn-primary:hover {
    opacity: 0.85;
}

/* Hero Section */
.hero {
    padding: 8rem 0;
    text-align: left;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-content {
    width: 100%;
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 2rem;
    letter-spacing: -0.03em;
}

.hero-accent {
    background: var(--accent);
    color: var(--text);
    padding: 0.1em 0.3em;
    display: inline-block;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 3rem;
    max-width: 500px;
    line-height: 1.6;
}

.hero-signal {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 3rem;
    padding: 1.5rem;
    background: var(--accent-subtle);
    border-radius: 1rem;
    max-width: 600px;
    align-items: flex-start;
}

.signal-lock {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.signal-title {
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.signal-body {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.5;
}

/* Features Section */
.features {
    padding: 6rem 0;
    background: var(--bg);
}

.features h2 {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 4rem;
    letter-spacing: -0.02em;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.feature-card {
    text-align: left;
    padding: 0;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    letter-spacing: -0.01em;
}

.feature-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Download Section */
.download {
    padding: 6rem 0;
    background: var(--text);
    color: white;
    text-align: center;
}

.download h2 {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.download p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 2.5rem;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.download-btn {
    display: inline-block;
    background: var(--accent);
    color: var(--text);
    padding: 1rem 2.5rem;
    border-radius: 0.75rem;
    text-decoration: none;
    font-weight: 700;
    transition: all 0.3s ease;
    font-size: 1rem;
    border: none;
    cursor: pointer;
}

.download-btn:hover {
    opacity: 0.9;
}

/* Footer */
.footer {
    background: var(--bg);
    color: var(--text-lighter);
    padding: 3rem 0;
    text-align: center;
    border-top: 1px solid var(--border);
}

.footer .container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.footer p {
    margin: 0;
    font-size: 0.95rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s;
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: var(--text);
}

/* Legal Pages */
.legal-page {
    padding: 4rem 0;
    max-width: 800px;
    margin: 0 auto;
}

.legal-page h1 {
    font-size: 2rem;
    margin-bottom: 2rem;
}

.legal-page h2 {
    font-size: 1.3rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.legal-page p, .legal-page li {
    margin-bottom: 1rem;
    color: var(--text-light);
    line-height: 1.8;
}

.legal-page ul {
    margin-left: 1.5rem;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar {
        padding: 1rem 0;
    }

    .navbar .container {
        flex-direction: row;
        gap: 1rem;
    }

    .nav-links {
        gap: 1.5rem;
        font-size: 0.9rem;
    }

    .logo {
        font-size: 1.25rem;
    }

    .hero {
        padding: 4rem 0;
        min-height: auto;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .features h2 {
        font-size: 2rem;
        margin-bottom: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .download h2 {
        font-size: 2rem;
    }

    .download-buttons {
        flex-direction: column;
    }

    .download-btn {
        width: 100%;
    }

    .footer .container {
        flex-direction: column;
        gap: 1rem;
    }

    .footer-links {
        gap: 1.5rem;
        flex-direction: row;
    }
}